Zenith Lapis Lazuli MOP incrusted "Staple" Prototype from 1970s

This beautiful and possibly unique yellow gold, lapis lazuli, and mother-of-pearl Zenith watch with rectangular prototype "Staple" case. Produced in 18k solid gold, no hallmarks present and distinctive "PAE" sticker which stands for "Prototype d'Avant Édition," which translates to "Pre-Edition Prototype" in English. This term might have been used internally by watch manufacturers to denote prototype models developed before mass production. It. Therefore, without more details, it's challenging to provide more information, but we're certain this is one of the rarest and craziest watches we have encountered.

Brand:  Zenith
Model: "Staple" (nickname)
Reference: N/A
Year of Manufacture: 1970s
Material: 18k gold
Dimensions: 24 x 48 mm
Movement: Hand-wound
Box/Papers: Watch only
Mechanical Operation Warranty: 6 Months

Comments: The watch is in optimal mechanical and aesthetic condition, movement has not been serviced, watch is in untouched conditions, New Old Stock Condition. Lapis Lazuli and mother of pearl without cracks.